CoAsia Microelectronics Corp.

MA-M

MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.

PrefixA4:58:0F:50:00:00 /28

Vendor address13F, No. 3-2, Park St. Nangang District Taipei TW 11503

RegisteredSep 4, 2016

Block rangeA4:58:0F:50:00:00– A4:58:0F:5F:FF:FF

Address capacity1,048,576

AdministrationUniversally administered: its prefix comes from a block registered through the IEEE Registration Authority

TransmissionUnicast: addressed to a single device

SourceIEEE Registration Authority

Address capacity is the size of this registered block, not a count of devices actually manufactured or online. Registration identifies the organization holding the block, not a specific device model or unit.

Curious how a prefix like this turns into a full address? See how MAC addresses are structured →

Example addresses in this block

A4:58:0F:50:00:00 A4:58:0F:57:FF:FF A4:58:0F:5F:FF:FF

Where this block sits

Previous A4:58:0F:40:00:00 /28 Shenzhen City billion Leiden science and Technology Co., Ltd. Next A4:58:0F:60:00:00 /28 Astro, Inc

The nearest registered blocks of the same size on either side of this one in IEEE's address space.

CoAsia Microelectronics Corp. holds 1 registered blocks in the IEEE registry, ranking #8,684 of 33,427 organizations by block count.